| http://www.w3.org/ns/prov#value | - They come in the form of PowerPoint Presentations, video/dvd, posters, objects, pictures, graphs or charts, and sometimes may include the speaker's body ??? ??? ??? vocalized pauses filler words such as um and ah ??? ??? ??? PowerPoint used to create presentations ??? ??? ??? B key push to go to black ??? ??? ??? flip charts tablets you prepare in advance or create on the spot; turn to a new
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